Electrical Testing Using VAG1598/31 Test Box

Electrical Testing Using VAG1598/31 Test Box

NOTE:
- VAG1598/31 test box is designed so that it can be simultaneously connected to wiring harness at Engine Control Module (ECM) and also to the ECM itself.
- This is advantageous because electronic engine control remains fully functional (e.g. measurement of signals with engine running) when the test box is attached.
- Relevant test procedures note if Engine Control Module (ECM) should also be connected to the test box or not.
- If the Engine Control Module (ECM) is equipped with a metal anti-theft housing (for theft prevention), the metal anti-theft housing must be removed from the ECM to connect the test box. After repairs are complete, the metal anti-theft housing must be reinstalled.
- Always use VAG1594A connector test kit to attach measurement devices (e.g. VAG1527B voltage tester, VAG1526A multimeter etc.).

CAUTION: To reduce the danger of damage to electronic components, switch on power to components before connecting test leads and observe test requirements.

Special tools and equipment







- VAG1598/31

Procedure
- Switch ignition off.
- Remove the ECM.







- Connect VAG1598/31 test box to connector of wiring harness. Ground (GND) clip (arrow) at test box must be clipped to battery Ground. Relevant test procedures note if Engine Control Module (ECM) should also be connected to the test box.
- Perform test as described in relevant repair sequence.

NOTE:
Important notes after re-connecting Engine Control Module (ECM):
- Perform adaptation procedure for Throttle Valve Control Module -J338-. Throttle Valve Control Module -J338-, Adapting
- Check DTC memory and erase it if necessary. With Manufacturer's Scan Tool
- Generate readiness code. Readiness Code, Generating

Procedure after interruption of voltage supply,

NOTE:
Important notes after re-connecting Engine Control Module (ECM):
- Perform the adaptation procedure for the Throttle Valve Control Module -J338-. Throttle Valve Control Module -J338-, Adapting
- Check DTC memory and erase it if necessary. With Manufacturer's Scan Tool
- Generate readiness code. Readiness Code, Generating